Reuters: China backs a climate change accord struck at a contentious summit late last year and wants a binding global agreement from talks culminating in Mexico later this year, Chinese Premier Wen Jiabao has said. The Chinese leader endorsed the “Copenhagen Accord” in letters on January 29 to the United Nations Secretary-General Ban Ki-moon and Danish Lars Lokke Rasmussen, whose country hosted the rancorous summit that produced the controversial, last-minute document on fighting global …